#AC2517
Closest named color: Rufous (#AE2012). oklch(48.7% 0.173 30.2), rgb(172, 37, 23).
Aa
White text reads best on this color (6.92:1).
About this color
#AC2517 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.173 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.006 away. White text reads best on it, at 6.92:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.173) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 3.03:1 |
| White text | 6.92:1 |
Values
| HEX | #AC2517 |
| RGB | rgb(172, 37, 23) |
| HSL | hsl(6, 76%, 38%) |
| OKLCH | oklch(48.7% 0.173 30.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #AC2517 | 6.92:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #AC2517 | 3.03:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #AC2517 text on white | 6.92:1 | AA | Lc 82.4 | Fine for body text |
| #AC2517 text on black | 3.03:1 | AA large text | Lc -19.5 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F6CEC7
oklch(88.4% 0.046 29.7)
-
Step 300
300
#F2ADA0
oklch(80.9% 0.084 30.9)
-
Step 400
400
#E87E6D
oklch(70.7% 0.134 30.3)
-
Step 500
500
#DE5846
oklch(63.2% 0.171 30.2)
-
Step 600
600
#C93626
oklch(55.5% 0.186 30.1)
-
Step 700
700 (this color)
#AC2517
oklch(48.7% 0.173 30.2)
-
Step 800
800
#8D2317
oklch(42.7% 0.144 30.3)
-
Step 900
900
#71231A
oklch(37.6% 0.112 29.8)
-
Step 950
950
#431610
oklch(27% 0.071 30)
#AC2517 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #504713 | 0.186 |
| Deuteranopia (no green cones) | #71640E | 0.167 |
| Tritanopia (no blue cones) | #BE0024 | 0.043 |
| Achromatopsia (no color) | #5A5A5A | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC2517
#AC2517
oklch(48.7% 0.173 30.2)
- #006C7A
#006C7A
oklch(48.7% 0.084 210.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #AC2517, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.006
- Rust Red #AA2704 ΔE 0.012
- Firebrick #B22222 ΔE 0.016
- Rusty Red #AF2F0D ΔE 0.019
- Brown #A52A2A ΔE 0.020
- Brick #A03623 ΔE 0.030
- Burnt Red #9F2305 ΔE 0.030
- Russet #A13905 ΔE 0.039
Use #AC2517 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.